using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.Web.UI;using System.Web.UI.WebControls;public partial class fenye : System.Web.UI.Page{    protected void Page_Load(object sender, EventArgs e)    {        if (!IsPostBack)        {            Repeater1.DataSource = new ChainDA().Select(Pagcount, 1);//默认是5条数据，第一页            Repeater1.DataBind();            Label1.Text = "1";//打开就显示当前第1页            for (int i = 1; i <= Max(); i++)            {             //每一条数据都是ListItem                ListItem li = new ListItem(i.ToString(),i.ToString());                //复合控件                DropDownList1.Items.Add(li);            }        }        Label2.Text = Max().ToString();//显示总共多少页        btn_first.Click += btn_first_Click;//首页按钮        btn_end.Click += btn_end_Click;//末页按钮        btn_prev.Click += btn_prev_Click;//上一页按钮        btn_next.Click += btn_next_Click;//下一页按钮        Button1.Click += Button1_Click;//点击跳转按钮        DropDownList1.SelectedIndexChanged += Button1_Click;    }    void Button1_Click(object sender, EventArgs e)    {//跳转按钮        int a = Convert.ToInt32(DropDownList1.SelectedItem.Text);        Label1.Text = a.ToString();        Repeater1.DataSource = new ChainDA().Select(Pagcount, a);        Repeater1.DataBind();//重新赋值    }    int Pagcount = 10;//每页显示多少条       //下一页按钮    void btn_next_Click(object sender, EventArgs e)    {        int num = Convert.ToInt32(Label1.Text);//        num++;//下一页        if (num >= Max())//超过最大页就不执行了，下面语句也不执行        {            return;        }        Label1.Text = num.ToString();        Repeater1.DataSource = new ChainDA().Select(Pagcount, num);//显示Pagcount条数据，num是下一页        Repeater1.DataBind();//重新赋值    }    //上一页按钮    void btn_prev_Click(object sender, EventArgs e)    {        int num = Convert.ToInt32(Label1.Text);//        num--;//上一页        if (num < 1)//超过最小页就不执行了，下面语句也不执行        {            return;        }        Label1.Text = num.ToString();        Repeater1.DataSource = new ChainDA().Select(Pagcount, num);//显示Pagcount条数据，num是上一页        Repeater1.DataBind();//重新赋值    }    //末页按钮    void btn_end_Click(object sender, EventArgs e)    {        Repeater1.DataSource = new ChainDA().Select(Pagcount, Max());//显示Pagcount条数据，Max()是最大页        Repeater1.DataBind();//重新赋值        Label1.Text = Max().ToString();    }    //首页按钮    void btn_first_Click(object sender, EventArgs e)    {        Repeater1.DataSource = new ChainDA().Select(Pagcount, 1);//显示Pagcount条数据，1是首页        Repeater1.DataBind();//重新赋值        Label1.Text ="1";    }    private int Max()//最大页    {        int count = new ChainDA().Select().Count;        double aa= count/(Pagcount*1.0);//所有的数据除以每页显示的条数就是一共多少页        return Convert.ToInt32(Math.Ceiling(aa));//返回最大或等于的整数    }}

using System;using System.Collections;using System.Collections.Generic;using System.Linq;using System.Web;using System.Web.UI;using System.Web.UI.WebControls;public partial class Default2 : System.Web.UI.Page{    protected void Page_Load(object sender, EventArgs e)    {        if (!IsPostBack)        {            Repeater1.DataSource = new CarData().Select("select *from Car", new Hashtable());            Repeater1.DataBind();        }        Button2.Click += Button2_Click;    }    void Button2_Click(object sender, EventArgs e)    {        Hashtable hs = new Hashtable();//哈希表集合，自定义        int count = 0;//中间变量        string Tsql = "select *from car";//默认查全部        if (TextBox1.Text != "")        {            Tsql += " where name like @a";//防攻击            hs.Add("@a", "%" + TextBox1.Text + "%");            count++;        }        if (TextBox2.Text != "")        {            if (count > 0)            {                Tsql += " and oil=@b";            }            else            {                Tsql += " where oil=@b";            }            count++;            hs.Add("@b", TextBox2.Text);        }        if (TextBox3.Text != "")        {            if (count > 0)            {                Tsql += " and powers = @c";            }            else            {                Tsql += " where powers = @c";            }            hs.Add("@c", TextBox3.Text);        }        Label3.Text = Tsql;        Repeater1.DataSource = new CarData().Select(Tsql, hs);        Repeater1.DataBind();       // select *from car where name like "%"+ + "%" "and oil=" + + "and powers=" + +;    }}